Meta Platforms Technologies, LLC

Facebook Technologies, LLC

Christopher Yuan Ting Liao

Andrew John Ouderkirk

Tanya Malhotra

Kenneth Alexander Diest

Robin Sharma

Katherine Marie Smyth

Sheng Ye

Jack Lindsay

Christopher Bruce Stipe

Austin Lane

Jonathan Robert Peterson

Maik Andre Scheller

Karol Constantine Hatzilias

Gregory Olegovic Andreev

Thomas John Farrell Wallin

Yigit Menguc

Barry David Silverstein

Erik Shipton

Arman Boromand

Liliana Ruiz Diaz

Nagi H Elabbasi

Taha Masood

Renate Eva Klementine Landig

Spencer Allan Wells

John Goward

Yigit Mengue

James Howard Thomas Ransley

Hao Mei

Laura Cressman

Qi Zhang

Anurag Tyagi

Thomas Wallin

Giuseppe Calafiore

Wanli Chi

Alexander Koshelev

Jeb Wu

Daniele Piazza

Guohua Wei

Emma Rae Mullen

Hayden Erik Hernández

Tianshu Liu

Ehsan Vadiee

Paul Armen Tchertchian

Giancarlo Sigurd Sante Nucci

Ken Diest

Clare Joyce Robinson

Greg Olegovic Andreev

Karol Constantine Hatzillias

Ruiting Huang

Rongzhi Huang

Cody Wayne Weyhrich

Rui Jian

A mechanically and piezoelectrically anisotropic polymer thin film may be formed by gel casting a solution that includes a crystallizable polymer and a liquid solvent. The solvent may be configured to interact with the polymer to facilitate chain alignment and, in some examples, create a higher crystalline content within the cast thin film. The thin film may also include up to approximately 90 wt. % of an additive and may be characterized by a bimodal molecular weight distribution of a crystallizable polymer where the molecular weight of the additive may be less than the molecular weight of the crystallizable polymer. In some examples, the polymer(s) and the additive(s) may be independently selected from vinylidene fluoride, trifluoroethylene, chlorotrifluoroethylene, hexafluoropropene, vinyl fluoride, etc. The anisotropic polymer thin film may be characterized by an electromechanical coupling factor (k) of at least 0.1.

PVDF thin films having high electromechanical efficiency and a gel casting method for forming same

An electromechanical actuator includes a primary electrode, a secondary electrode overlying at least a portion of the primary electrode, and an electroactive layer disposed between the primary electrode and the secondary electrode, where the electroactive layer has a first curvature when zero voltage is applied between the primary electrode and the secondary electrode, and a second curvature when a non-zero voltage is applied between the primary electrode and the secondary electrode.

Deformable lens with an extended range of stability

A method includes applying a stress to a polymer thin film to stretch the polymer thin film along a first in-plane direction, and subsequently applying a stress to the polymer thin film to stretch the polymer thin film along a second in-plane direction orthogonal to the first in-plane direction to form an ultra-high modulus polymer thin film. Calendaring or hot pressing of the ultra-high modulus polymer thin film may improve its optical and/or thermal properties.

Drawability enhancement in polymer thin films

A high voltage-driven system includes a high voltage optical transformer and a high voltage driven device, where the high voltage optical transformer is located in close proximity to the high voltage driven device. A high voltage connection between the high voltage optical transformer and the high voltage driven device may be shorter than a low voltage connection between the high voltage optical transformer and a low voltage power source used to control the transformer.

High voltage optical transformer integration

A liquid lens includes a substrate, a transparent elastic membrane forming a cavity with the substrate, and a transparent fluid filling the cavity between the substrate and the membrane. The membrane has a pre-distorted, rotationally asymmetric shape in absence of the fluid in the cavity. When the cavity is filled with the fluid and the substrate is disposed vertically w.r.t. gravity at a pre-defined clocking angle, the membrane adopts a substantially rotationally symmetric shape due to elasticity of the membrane counteracting gravity exerting a downward force on the fluid in the cavity, reducing the effect of the gravity sag on optical performance of the liquid lens.

Liquid lens with gravity sag correction

A light source structure includes a vertical cavity surface-emitting laser (VCSEL) device having a top surface and at least one side surface substantially perpendicular to and adjoining the top surface. The VCSEL device is configurable to output directed emission of light through the top surface. The light source structure also includes a light barrier surrounding at least a top portion of the VCSEL device and separated from the at least one side surface. The light barrier is configured to receive spontaneous emission out of the VCSEL device through the at least one side surface.

Vertical cavity surface-emitting laser (VCSEL) with a light barrier

An optically clear, high strength, high modulus, and high thermal conductivity polyethylene thin film may be formed from a crystallizable polymer and an additive configured to interact with the crystallizable polymer to facilitate crystallite alignment and, in some examples, create a higher crystalline content within the polyethylene thin film. The polyethylene thin film may be characterized by a bimodal molecular weight distribution where the molecular weight of the additive may be less than approximately 5% of the molecular weight of the crystallizable polymer. Example crystallizable polymers may include high molecular weight polyethylene, high density polyethylene, and ultra-high molecular weight polyethylene. Example additives may include low molecular weight polyethylene and polyethylene oligomers. The polyethylene thin film may be characterized by a Young's modulus of at least approximately 10 GPa, a tensile strength of at least approximately 0.7 GPa, and a thermal conductivity of at least approximately 5 W/mK.

High strength and high thermal conductivity polyethylene thin film having a bimodal molecular weight

A mechanically and piezoelectrically anisotropic polymer thin film is formed from a crystallizable polymer and an additive configured to interact with the polymer to facilitate chain alignment and, in some examples, create a higher crystalline content within the polymer thin film. The polymer thin film and its method of manufacture may be characterized by a bimodal molecular weight distribution where the molecular weight of the additive may be less than approximately 5% of the molecular weight of the crystallizable polymer. Example polymers may include vinylidene fluoride, trifluoroethylene, chlorotrifluoroethylene, hexafluoropropylene, and vinyl fluoride. Example additives may occupy up to approximately 60 wt. % of the polymer thin film. The polymer thin film may be characterized by a piezoelectric coefficient (d) of at least approximately 5 pC/N or an electromechanical coupling factor (k) of at least approximately 0.1.

PVDF thin film having a bimodal molecular weight and high piezoelectric response

A high-voltage optical transformer may include (1) an array of light-emitting devices that are connected in parallel with one another and are electrically coupled to an electrical input, (2) a transfer medium, and (3) an array of photovoltaic cells that (A) are optically coupled to the array of light-emitting devices via the transfer medium, (B) are connected in series with one another, and (C) produce an electrical output whose voltage is higher than the electrical input. Various other apparatuses, systems, and methods are also disclosed.

Apparatus, system, and method for stepping up high voltages within small form factors via optical couplings including an array of photovoltaic cells optically coupled to parallelly connected light emitting devices via a transfer medium

An actuator may be integrated into an optical element such as a liquid lens and configured to create spherical curvature as well as a variable cylinder radius and axis in a surface of the optical element. An example actuator may include a stack of electromechanical layers, and electrodes configured to apply an electric field independently across each of the electromechanical layers. Within the stack, an orientation of neighboring electromechanical layers may differ, e.g., stepwise, by at least approximately 10°.

Actuator with variable cylinder

A liquid lens includes a transparent substrate, a multilayer polyurethane-based membrane overlying the transparent substrate, and a liquid layer disposed between and abutting the transparent substrate and the multilayer polyurethane-based membrane. The multilayer polyurethane-based membrane, which may include thermoplastic and/or thermoset polymer layers, may be formed by slot die coating or gravure coating one or more constituent layers and may exhibit a reversible elastic response to imposed strains of up to approximately 5% while limiting the transpiration of fluid therethrough to less than approximately 10g/m/day.

Coated multilayer optical barrier

A liquid lens architecture includes a transparent substrate, a multilayer thermoplastic polyurethane (TPU)-based membrane overlying at least a portion of the transparent substrate, and a liquid layer disposed between and abutting the transparent substrate and the multilayer thermoplastic polyurethane-based membrane. The TPU-based membrane may exhibit a reversible elastic response to imposed strains of up to approximately 2% and is configured to limit the transpiration of fluid to less than approximately 10g/m/day.

Multilayer optical barrier

Angular sensors that may be used in eye-tracking systems are disclosed. An eye-tracking system may include a plurality of light sources to emit illumination light and a plurality of angular light sensors to receive returning light that is the illumination light reflecting from an eyebox region. The angular light sensors may output angular signals representing an angle of incidence of the returning light.

Angular light sensor and eye-tracking

A method of forming a high voltage optical transformer includes forming a via through a transparent carrier wafer, forming a conductive layer within the via, bonding a solid state lighting (SSL) package to a first side of the carrier wafer, and bonding a photovoltaic (PV) wafer to a second side of the carrier wafer opposite to the first side. The photovoltaic wafer may include an active area and a conductive area located outside of the active area that is in electrical contact with the conductive layer. The method further includes forming both an SSL contact with the solid state lighting package and a PV contact with the conductive layer on the same side of the carrier wafer.

Wafer-level 3D integration of high voltage optical transformer

A device includes a light source to emit light and a light detector to receive the light emitted by the light source. The device may include a high voltage optical transformer and may be configured such that the light detector is laterally spaced away from the light source. In some architectures, the light source and the light detector may be arranged in a common plane. A photonic integrated circuit may be used to couple light emitted from the light source to the light detector.

Photonic power converter light transport

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Seattle, WA, United States of America

Christopher Yuan Ting Liao